Trailer



vMay *31.` 1927,

E. F. HARTwlcK. l

TRAILER Filed may e. 1922 s sneetslsneet 2 Patented yMay 31, 1927.

naires sra-rss ferries; 1

i ERyEs'r F. HATW rex, or DEfJJRprT, lvrrirrsiv, AssIGNeR'ro DETROIT 'rRAIIfeR' Coivr-` Paitg'pr DETROIT," MICHIGAN, ri'co'RoeAroN for MICHIGAN!" Application sie@ may e,

This invention relates to theoonstrnction ofjtrailers Consisting or"V similar-front and rear trucks, eaeli fproyided Withlysteering mechanisni,-a stiff reach extending between the trucks; so that ythe rear triikjinaybe steered by the former, .and its object is to Previlele .e trailerv which' shell beve. greet eeiieeiiy, Whieb ,shell ,here greet strength, enel which can beveasily handled.-

In the accompanying drawings, Fig. l is ,side elevation .ef e treilei embodying my invention, one ,of the Wheels beingjjbrolzen away'iforthe sake of clearness, 2 isa side elevation ,of a trailer triiek with one of the Wheelsbreken ewes eed the 'dre-it een# mestieri emitted -efe'r the sake et eleeriiess- Sois a plan of atrailer. Fig. 4: is side i elevation eithedreit and steering *iiieehavhas en exile fl teerhieh ere eeiineeteel 'the Neue-l stub-sbarra whieh .Carry i elle wheelsl Eaeh axle neertits eiids enel-'just Witbiiitbe steering knuckles .Carries ille-,seelellee 3 `Whieb eupreit the i lebeieiiel :side vfreine bere' 4- i A neirefrsprinss 5 are belerieeelen. eefeb eide .above the fremebers end-ehe limer ends `f eh'esefsprinss ere eelineeteel vte Jehe bres-fleets .6 by means et pies-7 and Seite liiilisfi- [The brackets are atteebed bathe vlower `sides ef the channel side bers LlDfen the channel crees baits l1 end the timbers l2 De the side 'bere-10, ere `ieeirs ef. ensle speer i,iigvbeis ,l 'Thejtifbeltsl that lipid' the l i .springs v@me the saddles else seeeie the. besee .16- fort-he eelsprings ,17. Shertsefety chainsglS may be employed'ifl desired. shown in Fig. 3,- the eross bars 11 and timbers ,1;2 esteri@ bere-eel.:the @fester Wheels and thus prevent 4beams and .timbers While being loaded or unloaded from falling onto y the Wheels.V The side bars 10,l cross bars 11, timbers 12vv and spacing bars 14 together con-V stitute What is known as bunks, Which have a limited rocking movement in all directions because of the springs lbeing Ybalanced on the axles. f Y

t'egral with the ieeel essere. ,eeeeaa .tierisef .the sible-freine bers eferefthe treme.- veisei-Lbeems 20 .(Fis- 7) vandtethese l'- v beeiiislere'eeieeiied theieleies 2l- Vletendi ing outward fronieach VI-bealn is Vabracket 22 (Figi fi.) i Wbieli .Carries e' king-@1h23 seii-y tral over 'thee-.Xie l. Attaelied te this kine'- belt is 'eieeipfiei inner drew-bar24. (Fis- 7) Wliiebhes eri upper portieri vp1ended with aneyellto -receiye the king-bolt 23, and t en eiiii 26 wbielij else ieeeres the kier-ebelt and eXtendsinWaI- dly beyond that' point ,and basa pinl 2f( at its end. Adrag linlgQSconf 'Beets te this Pin anelitoasteefingeim 29- ef one ivheel'ivhlea parallel-link SQZCQIiIiee-is this arm to Wheel .o

It W'll'be notieed thatithe eiieetije length mi d the steeririgerm 31 the other .Off *the erm: 2b-is less their thetef the 29 i sie theft thewbeels Zwillbe swiiiigfthieiigb e f lessee elisle: then tbejdrefw bei As result; 1 the Wheels will vfellew the; outside -lieeszof road ourves'so that a `number of these'ize-l liieles einer:bebiieliedftesetber ,fe-1t hauling? .i

so I Y single ereeteis;` i The inner ends of the iiiiibers enel less @while-:being drawn by sie@ fame bars fr ere ,beet tenere( eeeh other end.- eeviineeeedf'by ple-tes Perellel VVbers .3e may extend from be "veen `*the Plates 33 o te .belles7 v:the

mein Diete@ .2l .imite tbeireiisverse ,I-beeiii 20E Thepletes.eresletteelte reeere the ediusiablefeellars 5e-which grin the reach 36 'ertendine; tei-the ether truck ef 'the1vef` hide." o-Thisrreeehs preferably ,tube ef geese ereiisiiei'se. stiffness, se thet- .the reef trnel.willffollorivftheA leading .triiclQaiid-the i 'sriri ofthe 'ieellerls 35i muse bev fsiiieieiitlv 'Y sreetlto ttrerisifiit" Pell; from ehetrueleiel the. etbei'- eer-ether? desiredfeerineetien may Estel-dingbeiiireei iiiheefufer eiids ef-tlie l 'Y side'rfreme besse ef eeehntriiek'ere tire @erred bers 38e-nele?) peefellel .te eie-.eh` other;

4 Q5 i ne "eiriieleyeelibetween ,the triieks end f ehe leo f" *mountedV on vthe lowerfeurved bar, 39j and carries a pin 43 on which the outer` orl auxl idefolates "40. i'The Y outer i end 42 of vthe main dra-W bar 24 isv slidably ,i 105 iliary dranT bar lllisinounted. This draw i barv leiis also, ymovable betweenfthe bars 38,'`

and 39 and has curved armsi45rfextending from each side,Y and forwardly: extending vL10 I lugs 46 providedwith holes to receive ythe y. lifted or dropped by the lever. 52L-and these Vio pins are adapted to engage in the notches 53' in thev lower curved bar 39 and 541m the auxiliary or jfront- 'draw bar 44; See` Fig. 5.

VThis construction'of a'main draw ybar 24,

auxiliary draw'bar 44, curved guide bars138 .wand-39 andlocking ping mim-ms no part of 'the' PTQSQDC` invention'as Vit is'old and Well VknowngfV T -f A*When a pin 51 elevated to lockV the auxiliary draw bar 44 to the main draw bar 24, V'so that the two act,y as one bar. Vhen the truck is to be the rear end of the vehicle, vthe-'pin 50 is elevated to enter 'the notch 52 Vand'lo'ckthe main Vdrawloar 'centrally -ofthetruck and to cause` the vwheels controlled thereby to Vremain yparallel to the reach. Y The vSwingofthe` inember 44 is limited bythe arms 45 which extend down` into they plane of the upper portion of the bar 39. f

When a trailer is hauled empty, thev adjustable chains 55V (Figs. 1 yand 3) between the bunks of the front Vand rear trucks ofy the Y .trailerfprevent'side thrusts fromV breaking the'reach. y

` As statedbeformthe reacliisprovided for VSteering and haulingpurposes andv thebunksV havea limited rocking movement Von the axle; 1

without ystraining the reach. *This'f permits the'loadlto adjustitself tothe bunks and as these are balanced yon the axle,-a great -freedomfof movementis obtained andi-maximum loads -can be carried without straining any of the parts when rough roads causeftwist'ing lof the v'ehicle. r The reach can turnfreely in at least one of the trucksso' thatthe tilting Vmovement of one truck' is Communicated tov Ithe'other only throughthe load and this I twisting is easily taken care'of by thesprings fand lthe connections between the springs Vand bunks. The short safety chains l8f`prevefnt the bunks' from swinging too far.:` This trail- 'fei' is; therefore adapted .for YV heavy Vhauling over the'V worst roadsf'and suoli vehicles 'can b'e'coupledinto trains to beV pulled along by fasingle tractor. There is neverjanyload on Vtherea'ch and it may therefore be made comi paratively light, all the stresses thereon re- 7 sultingponly from the-haulingand steering.

truckisjto:belthe vfront end ofV thevehicle, Vthe pin-50 isdepressed andthe logs, the side stresses `onfthe reach are so smalljthat aehain might be used in place yof the tube.

The details of fconstructionfcan lalli'be changed by those skilled in the art without Y l departing from thespiritof my invention as set forth in the followingjlclaimst I claim :-V

when the' vehicle isioaded webteam@ Y 'la A vehicle consisting of a pair of-trucks, Y

eachembodyingan axle, wheels therefor,

s mounted onn the axle anda pair ofisprin on' the springs, means conbunk mounted 7o Vnec-ting the bunks toltransmittractive forceVK v from one truck to thejother, afreaehfrota-r tably mountedY in :both truckswhereby [one f I maybe hauled and steered lby the other and i the reach relative to the' trucks'. Y

means to prevent .longitudinal vmovement of each embodying an axle, wheels thereon and a Vframe mounted von the axle, a `paiiyof springs balanced on the Vaxle above the frame,v

a bunk mountedon each pair of springs and havingaV limitedrockingmovement 'in vall j directions relative to the frame, areach ro-x tatablyVv mounted in one truck to, transmit traction from one vto theother and`r permit rollingV movementA between them one of said frames being Aformed with a socketV wherein said reachV is rotatably mounted, andwit-h a recess transversely tothe socket, and a cfol-V I lar on the lreachV mountedin said recessto prevent longitudinal movement'of the reach intheframe.V

3. In a vehicle, a

pair of truclrs,"`each ein! bodying an axle, wheels thereon and a frame f vmounted on theV axle; lafrea'Chv rotatably .l mounted in onev truck` to Vtransmit traction from one truck to thejother and permit rollin said reachis rotatably moui'ited: l f l ingr? movement between them, one 'of said' f Vframes being formed with asocket. wherec 10ok 4J In 'a.vehicle, apair of trucks, each em,-

bodying anaxl'e, .wheels thereon and iframe i Ymounted on `rvthe axle, ayieach rotatably iV .f

`mounted in Vone truck to transmit tractionV fromone truck'tofthe other and permitfroll-AV ing movement between them; one ofgsaid/ frames beingfor'me'd with'a socket wherein f *said* reachis rotatably mounted andf-with va recess transversely `to the'socket, and '1a' collar jinsaid. recess -andffattached to the vreach to prevent longitudinalinovement of thereach lin the socket. 1

. ERNESTFQHAnrWicK. 

